Printing-machine.



R. GRANT & F. C. MAIRSON.

PRINTING MACHINE.

APPLICATION FILED MAR. a. 1916.

Patented July 31, 1917.

' INVENTORS.

WITNESSES:

ATTORNEY- UNITED STATES PATENT onion ROBERT GRANT, OF CHICAGO, AND FREDC. MAIRSON, OF FOREST PARK, ILLINOIS.

PRINTING-MACHINE.

Application filed March 8, 1916.

To all whom it may concern.

Be it known that we, ROBERT GRANT and FRED CHARLES IVIAIRSON, citizensof the United States, residing, respectively, at Chicago and ForestPark, in the county of Cook and State of Illinois, have invented certainnew and useful Improvements in Printing Machines, of which the followingis a specification.

Our invention relates to improvements in printing machines, and moreparticularly to that type of a printing machine commonly known as theGordon press, in which the ink rollers pass over a revoluble inking diskand over the face of the type secured in the swinging type and diskcarrying arm.

The objects of our improvements are to provide means for the purpose ofadjusting the inking rollers so that no matter what the diameter of saidrollers may be (within certain reasonable limits) the pressure upon theface of the type and upon the inking disk may be maintained at always auniform pressure until the rollers have become worn so that they arepractically useless; and, to provide an attachment, for the above statedpurpose, to said style of press, without changing the construction inany way, shape or manner, except to provide some tapped holes, and, apair of drilled holes for the adjusting eccentric stud; and, to provideadjustable inkingroller-carrying-rails for the purpose as above stated.

These and other objects of our improvements will be more clearly pointedout in the accompanying drawings, specification and appended claims.

In the accompanying drawings Figure 1, represents a side elevation ofpart of a press, of the above stated kind, showing our inventionembodying our improvements attached, and, partly broken away, showingthe other side, or far rail, and, also showing the type and type framein section.

Fig. 2, represents a side view (on a larger scale) of one of theadjustable inking rollercarrying rails, detached from the type carryingarm of the press.

Fig. 3, is a section on line AA of Fig. 2, showing the adjustingeccentric stud, and, showing in section, part of one side of the typecarrying arm.

Fig. 4, is a section on either of lines-BB,

Specification of Letters Patent.

Patented July 31, 1917.

Serial N 0. 82,821.

also of Fig. 2, showing the clamping screw for the said rails, andshowing in section, part of one side of the type carrying arm.

Fig. 5, is a side view which represents that part of one side of thepresent typecarrying-arm, of which the one edge is parallel with thetype and with the rotating inking disk. In the drawing is also shown thetapped holes and one of the drilled holes previously mentioned.

Fig. 6, is a side view of our improvements as attached to the typecarrying arm, but on a larger scale and showing it moved back so thatthe roller carrying face, edge, or track, coincides with, or being inthe same plane as, those of the type carrying arm, thereby making up forthe reduced diameter of the inking rollers, caused by wear.

Fig. 7, is a detailed view of the eccentric adjustment stud.

Similar characters refer to similar parts throughout the several views.

In Fig. 1, will be seen our invention as attached to the type andinking-disk-carrying arm (2), of a printing press (A), commonly known asthe Gordon press. In the same figure will be seen the inkingroller-carrying arm (B) broken away in order to more clearly show themain points relative to the invention, and to the inking rollers (3),and the traveling rollers (4), which are mounted on shafts (5),revolubly mounted in bearings (D), which are not shown on the near side,but which are secured to the partly shown tension members, or rods (0),which are car ried in the arm The plates (A being the inventionembodying our improvements are so constructed that the edges (A will beparallel with the edges (A of the arm (2), except at the curved portions(A and (A It will also be noticed, in Fig. 1, that the type face (A andthe inking disk (A are shown slightly away from the surfaces (A of thearm (2), but are, respectively, parallel with the edges (A and (A And inviews Fig. 1, Fig. 2, and Fig. 6, counter slotted holes (A and (A areshown, arranged in the direction of the arrows, which is in an angulardirection midway of the plane of the type face (A and the inclined faceor plane of the disk (A") and through these slotted holes are insertedflat head screws (6), which are tapped into the arm (2) at (7), as shownin Fig. 5, more clearly.

In the plate (A shown more clearly in Fig. 2, and substantially midwaybetween the counter slotted holes (A and (A is a slotted hole (A atright angles to the slotted holes (A and (A and, at right angles to saidslotted hole (A is an elongated counter-bore (A shown on the reverseside of the plate (Al in dotted lines. Through this slotted hole (A andin the counter bore A is inserted an eccentric adjusting stud (8), andin arm is a drilled hole (9) to receive the end (10) of the stud (8). Itis obvious therefore, that any slight turn of said stud (8), in eitherdirection, will move the plate (A But in order to move said plates, theclamping screws, or plate locking screws (6) have to n be loosened, andwhen said plate is adjusted,

by means of said stud, to its proper place, said screws (6) aretightened and lock said plates (A to their place. Now, as the edges (Aof the plates (A are adjustably parallel to or from the face of the type(A and the face of the inking disk (A it can be clearly seen that anyvariation of the diameters of the inking rollers (23), can be readilycompensated for by the inward or outward adjustment of the adjustableplates, or rails (A Therefore Having thus described our invention, themerits of our improvements can be readily understood, and it will beseen that the minor details of our construction can be altered in manyways without departing from the spirit of our invention, but what weclaim and desire to secure by Letters Pat= ent is 1. The combination ininking-roller carrying-rails, in combination with a printing machine ofthe class set forth of, detachably secured side plates, or rails,adjustably mounted on the outer sides of the type and inking-diskcarrying-arm, with their inking roller carrying edge, or trackparallelly adj ustable to, or from, the face of the type and the surfaceof the inking disk; of means for adjusting said tracks consisting ofeccentric track adjusting studs engaging said tracks and revolubly heldin the type and disk carrying arm by said side plates, and trackclamping, or looking screws tapped into said carrylng arm.

2. The combination in a means for com pensating for the decreased orincreased diameters of inking rollers, in a printing machine of theclass set forth, of, adj ustably secured side plates, or tracks, mountedon the type and inking-disk-carrying-arm, with its roller carrying edgeor track parallelly adjustable to or from the face of the type and thesurface of the inking disk; adjustable track engaging eccentric studsmounted in the type carrying arm and held in place by said plates;clamping, or side plate looking screws tapped into the type carryingarm.

ROBERT GRANT. FRED G. MAIRSON.

WVitnesses: V

LAWRENCE WILSON, Jr., W. HARDING.

Copies of this patent may be obtained. for five cents each, byaddressing the Commissioner of Patents, Washington, D. C.

